JPS6034382A - Vibration-proof supporter for suspension support type high-temperature vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seismic isolation support device for a large-diameter, thin-walled suspended high-temperature vessel such as a tank-type fast breeder reactor.

The fast breeder reactor currently designed and manufactured has a diameter of 20 m, and because it uses liquid metal as a coolant, the thermal conditions are severe, and the vessel and its internal structure must be thin.

Figure 1 shows an overview of the structure of the reactor vessel of a conventional fast breeder reactor.
is installed and suspended by the roof slab (3) containing liquid metal as a coolant with a free liquid level. The roof slab (3) serves as a lid for the furnace vessel (1), and also serves as a stand for various equipment (not shown) inserted into the furnace. As shown in Figure 1, the support structure for the roof slab (3), which bears a large load including its own weight to hold these heavy objects and maintain the rigidity of the slab itself, has conventionally been constructed using the outside of the slab (3). The basic conventional means was to provide a skirt structure extending from the periphery to the building floor (4). This is because seismic resistance is the most important consideration in the design of this type of product, and the length of the skirt portion (3a) has been determined accordingly, taking into account the effects of thermal expansion. In this case, in accordance with the conventional seismic design policy for equipment, the resonance area is increased by increasing the natural frequency of the equipment with respect to the dominant frequency of the seismic waves that are transmitted and input from the equipment installation part through the building floor (4). k)
Ivy. Therefore, (1) the thickness of the skirt part (3a) needs to be above a certain level, and (n) on the other hand, the roof slab (3) is thermally deformed against the building floor (4) as the furnace is operated. Therefore, in order to absorb this through elastic deformation of the skirt portion, the height of the skirt portion (3a) must also be set to a certain height.

The above rain countermeasure (+1 ) The conflict between countermeasures against seismic stress and thermal stress in structures has become even more serious, and in cases where seismic conditions are severe, such as in Japan, it is necessary to implement various structural measures, and a considerable amount of structural material is required. We are forced to increase the quantity of goods.

For example, in order to increase the rigidity, the plate thickness is increased, and in order to alleviate the thermal stress that tends to increase accordingly, a heat shield must be added, and the rigidity must be further increased to compensate for the increased weight. did not become.

The present invention has been proposed in order to solve these problems, and includes a support member formed by connecting an annular member with a ■-shaped cross section in the radial direction, to the hanging support portion of the suspension support type high-temperature container. The present invention relates to a seismic isolation support device for a hanging support type high temperature container, which is characterized in that it is equipped with a suspension support type high temperature container.

In the present invention, as described above, a support member connected to a plurality of annular parts having a square cross section in the radial direction is interposed in the hanging F support part of a hanging type high temperature container.
The support member supports the vertical load, and the radial expansion displacement of the hanging member of the hanging high-temperature container accompanying the operation of the hanging type container is controlled by each of the radially connected parts forming the support part I. Due to the axisymmetric bending deformation of the annular member with a shaped cross section, it can be absorbed more easily than the conventional pre-skirt type support member, and in the event of an earthquake, each of the annular members undergoes mainly shear deformation, so that the entire (-) A flexible support structure is constructed in the horizontal direction, and the seismic isolation function is achieved in that the excavation of the building is hardly transmitted to the hanging members of the container.3 As described above, according to the present invention, the structure of the suspended high-temperature container is Since the entire supporting part is isolated, their structure does not require a rigid design in terms of seismic strength (this makes it possible to reduce the thickness of the structural material, making it easier to use when high-temperature vessels are in operation, stopped, etc.). It is possible to easily alleviate the thermal stress generated by the process, and therefore it is possible to significantly reduce the amount of structural materials.

By filling the V-shaped cross-sectional groove of each annular member with a viscous liquid, the flow resistance of the viscous liquid causes the relative displacement of each annular member with the building caused by an earthquake (low-period after-shot). It is possible to quickly attenuate the motion.

The present invention will be described below with reference to the illustrated embodiments.

Q (i is the reactor vessel 01 of a tank-type fast breeder reactor that houses the reactor core and primary cooling system) is suspended from the roof slab. The upper end flange of α2 is the same skirt (1
A combination skirt (1
It is mounted on the upper end flange of the inner skirt portion (13a) of 31 and fixed with bolts or the like. Furthermore, the upper end flange of the outer skirt portion (tab) of the combination skirt 0:l is connected to the inner skirt portion (1
It is mounted on the upper end flange of 4a) and fixed with bolts or the like, and furthermore, the upper end flange of the outer skirt part (14b) of the combination scarr H4) is mounted and fixed on the building floor a.

Therefore, each of the above combination skirts (+31 (14) constitutes the annular part of the above-mentioned ■-shaped cross section, and each of the same skirts) (13 + (
+4) and the above-mentioned scar) Q21 constitute the above-mentioned support member.

Also, oil is present in the V-shaped cross-section grooves formed between the outer surface of the roof slab 00) and the six innermost circumferential skirts, and in the V-shaped cross-section grooves of the combination skirts) (13) and (14).

A viscous liquid 06) such as 7g rough-in is loaded.

Here, the skirt (+2+, skirt part (13a)
(14a) supports the weight to be supported as a tension member, while the skirt portions (13b) and (14b) support the weight to be supported as pressure members, so the former members (1, 2)
(13a) and (14a) do not require consideration for buckling, and the plate thickness is slightly smaller than that of the latter members (13b) and (14b).

The support member supports the entire weight of the roof slab (10), the equipment mounted or suspended thereon, the furnace vessel (lυ) and the equipment built therein, and the liquid, and also supports the roof slab (10) during operation of the furnace. 10) The radial thermal expansion displacement of each stage of the V-shaped cross-sectional skirt 021(] 3+
The axially symmetrical bending deformation of (+4) can be absorbed more easily than the conventional single-skirt support member, and in the event of an earthquake, the skirts of each stage undergo shear deformation, resulting in horizontal flexibility as a whole. The support structure is constructed and exhibits a seismic isolation function in that almost no vibration of the building is transmitted to the roof slab OC:).

In addition, due to the flow resistance of the viscous liquid 00 filled in the ■-shaped cross-sectional grooves of the above-mentioned skirts (CIH3)041, due to the deformation of each skirt with the building caused by the earthquake (low-period total vibrations) It quickly attenuates.

According to the illustrated embodiment, since the entire supported body is seismically isolated, there is no need for their structure to have a seismic strength -h and a rigid design (therefore, it is not necessary to use thin structural materials). This makes it possible to easily alleviate the thermal stress that occurs when the furnace is operated, stopped, etc., and it becomes possible to significantly reduce the number of structural materials to be sewn.

In addition, viscous liquids such as oil and paraffin as damping materials can be easily replaced periodically by draining or injecting them if necessary. Further, any liquid can be used as the viscous liquid, and by using a mixture of different types of liquids, it is possible to select a liquid having a specific viscosity. If it is necessary to further increase the damping coefficient, as shown in FIG. The flow resistance may be increased by providing a protruding portion.

In the illustrated embodiment, a support member system having six sets of ■-shaped groove cross sections is shown, but the number of sets of support members can of course be arbitrarily selected.

Although the present invention has been described above with reference to embodiments, the present invention is of course not limited to such embodiments, and the design may be modified at will without departing from the spirit of the invention. be,

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional hanging support type high temperature container;
The figure is a vertical cross-sectional view showing one embodiment of the seismic isolation support device for a suspended support type high-temperature container according to the present invention, and FIG. 6 is a partially cutaway slope view of the skirt portion showing another embodiment of the present invention. be. fril+...Roof slab 0υ...Furnace vessel (1
21... Skirt (13) Q4J... Combination skirt (+51... Building floor sub-agent, patent attorney, 3 non-Kaimoto Important Cultural Properties (9) Figure 1 Figure 2

Claims (1)

[Claims] Seismic isolation support for a hanging support type high temperature container, characterized in that a support member formed by connecting an annular member with a ■-shaped cross section in the radial direction is interposed in the hanging support part of the hanging support type high temperature container. Device.